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Curcumin Decorated Silver Nanoparticles as Bioinspired Corrosion Inhibitor for Carbon Steel
- Source: Current Nanoscience, Volume 18, Issue 2, Mar 2022, p. 266 - 275
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- 01 Mar 2022
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Abstract
Background: Curcumin-stabilized silver nanoparticles (Cur-AgNp) were synthesized by a facile chemical method. The synthesized AgNp was, for the first time, used as a bio-derived corrosion inhibitor for carbon steel in the 1M sulphamic acid medium. Methods: The electrochemical studies via impedance spectroscopy, potentiodynamic polarization, and surface analysis are reported in the communication. The maximum inhibition efficiency of 92.87% was obtained at 800 mgL-1. Results: The impedance measurements revealed an elevation in the polarization resistance with growth in the inhibitor concentration, which supports the adsorption and inhibition behavior of Cur- AgNp on the steel surface. The inhibitor functioned by adsorption on the steel surface and obeyed the Langmuir kinetic-thermodynamic isotherm with a mixed mode of physical/ chemical adsorption. The potentiodynamic polarization study revealed cathodic predominating behavior. Conclusion: The SEM analysis depicted the development of a protective inhibitor film on the steel substrate, and FTIR-ATR analysis of the inhibited steel surface supported the adsorption of the corrosion inhibitor on the metallic surface.